3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php $attachments = array(1=>'a',2=>'b',3=>'c'); $id = current(array_flip($attachments)); echo $id;
Output for 4.3.0 - 5.0.4, 5.1.0 - 5.6.28, hhvm-3.10.0 - 3.12.0, 7.0.0 - 7.1.0
1
Output for 5.0.5
Fatal error: Only variables can be passed by reference in /in/30Xa8 on line 3
Process exited with code 255.